JPH09255263A - Lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light lifting device used even for the narrow stairs of a vessel or the like. SOLUTION: Since both frames 1A and 1B are placed oppositely to each other keeping an interval and respectively disposed in both sides of stairs A, the user of the stairs A is allowed to ascend/descend between the frames 1A and 1B, and in this case each of the widths of the frames 1A and 1B is about 50mm and the dimension of 300 to 550mm is a width for passing when the width of the stairs is 400 to 650mm, and thus the user easily ascends/descends even while a hoist gear is installed in the stairs A. Further, since the frames are disposed in both sides of the stairs A and a load base 5 is supported between both frames, each of the widths of the frames is formed to be narrow in dimension and the entire device is reduced in weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device which is installed on a staircase to elevate and lower loads and the like, and more particularly to a device which is suitable for use in a narrow staircase such as a ship.

[0002]

2. Description of the Related Art In a conventional lifting device, a frame having a guide rail is installed at one end side in the width direction of a staircase, and one end of a loading platform is supported by the guide rail, and the loading platform is placed at the bottom of the loading platform. There is one provided with a drive mechanism for driving. Then, when moving up and down, the loading platform is configured to move up and down on one end side of the stairs by moving on the guide rail. In this case, a person with a disability can be lifted and lowered while sitting on the bed, and the drive mechanism also moves together with the bed.

[0003]

By the way, in the above-mentioned prior art in which the loading platform is configured to move up and down on one end side in the width direction of the stairs, although there is no problem when it is used for a wide stairway in the width direction, ships and the like. When installed on such a narrow staircase, there are the following problems.

For example, in a narrow staircase having a width of about 400 to 650 mm, when the user goes up and down the stairs, if the cargo bed is stopped at the lowermost part or the uppermost part, the cargo bed will be protruded to the stairs. However, there is a problem that the user has to pass through while avoiding the stopped cargo bed, which obstructs the passage. Therefore, the conventional technique can be used only for wide stairs in the width direction, and cannot be used for narrow stairs such as a ship.

Further, even if the apparatus is installed on one side of the stairs, the whole apparatus is heavy, so that it is not possible to carry the apparatus by hand, and there is a problem that it is difficult to easily attach it to another place.

In view of the above-mentioned problems of the prior art, an object of the present invention is that it can be used even in narrow stairs such as a ship, and when it is not used, it does not interfere with pedestrians and it is lightweight. The purpose of the present invention is to provide an elevating device that can be easily attached to other places, and another object is to provide an elevating device that also considers safety during elevating.

[0007]

In the lifting device of the present invention, both frames, which are arranged to face each other with a desired interval, are installed on both sides of the stairs, chains fixed on both frames, and luggage And a driving means for moving the loading platform up and down along each chain on both frames.

Further, in the lifting device of the present invention, both frames, which are arranged to face each other at a desired interval and are installed on both sides of the stairs, chains fixed on both frames, and a luggage carrier for carrying luggage. And a drive means having a sprocket that moves up and down along the chains on both frames and meshes with the chains, a drive source having a drive source for driving the sprocket, and a surrounding of the sprocket of the drive means. It has a protective cover with front and rear covers at the front and rear in the direction of travel, and a safety mechanism that stops the drive of the drive means when an obstacle hits either the front or rear cover of the protective cover. It is characterized by that.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic perspective view showing an embodiment of a lifting device of the present invention, FIG. 2 is a schematic side view showing a main part of the lifting device, FIG. 3 is an explanatory view of driving means of the lifting device seen from the front, and FIG. FIG. 6 is an explanatory view showing the periphery of a protective cover of a lifting device.

As shown in FIG. 1, the lifting device of the embodiment is roughly divided into two pairs of frames 1A and 1B facing each other with a gap, a loading platform 5, and the loading platform along the frames 1A and 1B. And a driving means (not shown) for moving up and down so that it can be detachably attached not only to wide stairs but also to narrow stairs A (for example, about 400 to 650 mm) installed on a ship. It is configured.

As shown in FIGS. 1 to 3, the frames 1A and 1B are elongated bodies extending over a lower floor B and an upper floor C provided on a stair A and have a C-shaped cross section. By being connected by a plurality of reinforcing materials 2, they are arranged facing each other with a space. This reinforcement 2
Both ends are attached between the frames 1A and 1B by fastening means such as bolts, and the middle portion thereof is also attached to the front portion of an arbitrary staircase portion by fastening means as shown in FIG. 2, whereby the frames 1A and 1B are attached. Are installed on both sides of the stair A so as to extend from the lower floor B to the upper floor C.

Chains 3A and 3B are fixed to the upper end surfaces of the frames 1A and 1B in the lengthwise direction in order to guide the lifting and lowering of a loading platform described later. This chain 3
As shown in FIG. 3, A and 3B have frame 1 on both sides.
It is firmly fixed to the upper surface of A and 1B along the length direction of the frame.

The loading platform 5 is for loading luggage or both a luggage and an operator. As shown in FIGS. 2 and 3, the driving means for driving the loading platform 5 is provided in the lower portion of the loading platform 5, and the main body 6 in which the motor 7 is installed.
And connecting shafts 9 and 9 that are connected to the output shafts at both ends of the motor 7 via couplings 8 and project from both sides of the main body 6,
It has a sprocket 10 mounted on the connecting shafts 9, 9 and meshing with the chains 3A, 3B. The motor 7 is of a dual output shaft type and rotates in the forward and reverse directions.

Further, the drive means is a bed support 11
And two sets of two guide rollers 12a, 12
It also has b and. As shown in FIG. 2, the carrier support 11 is formed in a long shape slightly longer than the main body 6, and is attached to both sides of the lower portion of the main body 6 so as to project. It is arranged so as to face each of these frames 1A and 1B on the inner side between 1A and 1B. The guide rollers 12a and 12b are rotatably supported by both ends of the luggage carrier support 11 and arranged so as to be rollable along their lengths in the frames 1A and 1B.

The guide roller 12a of the driving means,
When the sprocket 10 is placed in the frames 1A, 1B and the sprocket 10 is in mesh with the chains 3A, 3B on the frame, the motor 7 drives the sprocket 1
When 0 is driven, the sprocket 10 is rotated and moved by the chains 3A and 3B, so that the loading platform 5 can move up and down along the frames 1A and 1B. That is, the drive means moves up and down together with the bed 5.
At that time, the guide roller 12 rolls in the frames 1A and 1B, so that the sprocket 10 moves to the chains 3A and 1B.
I try not to get out of 3B.

Further, both sides of the loading platform 5 in the depth direction (right side in FIG. 2) are pivotally supported at intermediate positions of the loading platform support 11 of the driving means, and both sides of the front end portion (left side in FIG. 2). It is installed on the upper part of the main body 1 by an adjusting bar 13 mounted between the lower end of the luggage carrier support 11 and the adjustment bar 13. A plurality of mounting holes 5a are provided at the front end of the loading platform 5, and one end of the adjusting bar 13 is pivotally supported by the mounting hole 5a at a desired position, so that the loading platform 5 is held in a substantially horizontal state. When the cargo bed 5 is at the lowest position in the desired state, it is selected to have almost the same height as the height of the first step of the stairs A, so that it can be used by workers as stairs. I have to. Therefore, the loading platform 7
Has enough strength to withstand the load of people carrying heavy items such as luggage.

Further, the lifting device of the embodiment has a protective cover 14 surrounding the sprocket 10.
The protective cover 14 has a shape capable of covering the upper portion and both side portions of the sprocket, as shown by a chain line in FIG. 3, and the front and rear portions thereof are supported by pins 15 as shown in FIG. Covers 14a and 14b are provided.

The protective cover 14 has a first safety mechanism. In the safety mechanism, a fixing member 16a is attached to one end side (upper side in FIG. 4) of the protective cover 14, one end of a rod 17a is attached to the fixing member 16a, and the other end of the rod 17a is in front. The cover portion 14a is inserted so that it slightly projects forward, and the rod 17 is provided between the fixing member 16a and the front cover portion 14a.
A compression spring 18a is mounted by inserting a, and one end portion of the responding piece 19a is further mounted inside the front cover portion 14a, while the limit switch is located in the protective cover 14 at a position corresponding to the other end portion of the responding piece 19a. 20a is attached.

A fixing member 16b is also attached to the other end side (lower portion in FIG. 4) of the protective cover 14, and the fixing member 16b, the rod 17b, the compression spring 18b, the responding piece 19b, and the limit switch 20b are also mutually attached. It is provided so as to have the same relationship as the above. When any obstacle collides with the front cover portion 14a of the protective cover 14 when the loading platform 5 is lifted by driving the motor 7, the front cover 14a resists the spring force of the compression spring 18a and the protective cover 14a.
In this case, the other end of the responding piece 19a moved together with the protective cover 14 presses the contact point of the limit switch 20a to stop the driving of the motor.

On the other hand, when an obstacle collides with the rear cover portion 14b of the protective cover 14 when the loading platform 5 is being lowered by driving the motor 7, the rear cover 14b resists the spring force of the compression spring 18b and the inner side of the protective cover 14 is prevented. Then, the other end of the responding piece 19b moved together with the protective cover 14 presses the contact point of the limit switch 20b, thereby stopping the driving of the motor 7. Therefore, each of the limit switches 20a and 20b is configured to stop the driving of the motor 7 when the contacts are pressed during the lifting and lowering of the loading platform 5. Therefore, the first safety mechanism including the compression springs 18a and 18b, the response pieces 19a and 19b, the limit switches 20a and 20b, and the like causes the front cover portion 14a and the rear cover portion 14b of the protective cover 14 to be obstructed when the loading platform 5 is moved up and down. It is configured to stop the motor 7 by operating when hitting an object.

Further, the protective cover 14 has a second safety mechanism for immediately stopping the cargo bed 5 when the power supply to the motor 7 is cut off or when the cargo bed 5 is moved for some reason. have. The second safety mechanism is
An engaging pin 22 attached to the upper portion inside the protective cover 14 and urged toward the chains 3A and 3B by the spring force of the compression spring 21, and a support portion 23 that supports this pin 22.
A rod 24 that normally fits in a groove formed in the engagement pin 22, a solenoid 25 integrally formed with the rod 24, and a speed sensor (not shown) that detects that the platform 5 has moved. ) And a controller 26 for exciting the solenoid 25 based on the detection signal from the speed sensor. The speed sensor is attached directly to the bottom of the loading platform 5 to detect the moving speed of the loading platform 5, but detects the moving speed of the loading platform 5 by interlocking with the rotation of the sprocket 10 of the driving means. It may be configured to do so.

When the motor 7 is stopped,
When the speed sensor detects that the speed of the bed 5 has become 0 or more due to the movement of the bed 5, the controller 25 excites the solenoid 25 and the solenoid 2
5, the rod 24 is sucked and the rod 24 engages with the engaging pin 22.
When the engaging pin 22 is pushed out toward the chains 3A, 3B by the spring force of the compression spring 21, the tip of the engaging pin 22 bites into the chains 3A, 3B, and the loading platform 5 does not move. I am trying. for that reason,
The second safety mechanism prevents the luggage carrier 5 from running out of control by causing the engagement pin 22 to bite into the chains 3A and 3B when the speed sensor detects the movement of the luggage carrier 2 when the motor 7 is stopped. . Therefore, the tip of the engagement pin 22 is formed to have a size that bites into the chains 3A and 3B.

It should be noted that the engagement pin 22 has the chains 3A and 3B.
When the engaging pin 22 is to be returned after it has been bitten into, the return button 27 provided on the upper portion of the protective cover 14
Is pulled, the engaging pin 22 returns to its original position, and the rod 24 of the solenoid 25 fits into the groove of the engaging pin 22.

On the other hand, as shown in FIG. 5A, the controller 26 has a power-on switch 26a for turning on and off the power to the motor 7, a power lamp 26b which lights up when the power is turned on, and The first and second safety mechanisms are provided with an abnormality notification lamp 26c which is turned on and an alarm device 26d. The abnormality notification lamp 26c is
When the limit switches 20a and 20b of the first safety mechanism operate and when the speed sensor of the second safety mechanism detects the speed, both are turned on by a command from the controller 26. The alarm device 26d gives an alarm to the surroundings by issuing an alarm while the loading platform 5 is moving up and down by driving the motor 7. The same operation as that of the alarm device 26d is also performed by the patrol light 28 installed on the platform 5. That is, the patrol light 28 is installed at the bottom of the luggage carrier 5 as shown in FIG.
The lights are turned on while the car is moving up and down so that the surroundings can be visually informed. This patrol light 28 is also controlled by the controller 26.

When the power-on switch 26a of the controller 26 is in the ON state, if the up button 29a of the operation switch 29 as shown in FIG. 5B is kept pressed, the motor 7 is driven in the normal direction. When the platform 5 is raised and the down button 29b is continuously pressed, the motor 7 is driven in the reverse direction so that the platform 5 is lowered.
Therefore, the operation switch 29 has an up button 29a and a down button 29b as well as an emergency stop button 29c and an reset button 29d for stopping the cargo bed 5 in an emergency. It should be noted that when the ascending button 29a (or the descending button 29b) is continuously pressed and the loading platform 5 is raised to the upper end portions of the frames 1A and 1B (or lowered to the lower end portions), the loading platform is prevented from coming off the frames 1A and 1B. 5 is configured to stop.

Further, the loading platform 5 has a folding type extension platform 51 in order to load the luggage in a stable state when loading a luggage larger than the loading platform 5. One end of the extension table 51 is connected to both side portions of the tip of the loading platform 5 via hinges 52, and an adjuster 53 and a reinforcing bar 54 are attached to the other end. The adjuster 53 is brought into contact with the lower floor B of the stair A when the extension table 51 is folded with respect to the cargo bed 5 as shown by the solid line in FIG. 4 and as shown by the chain line in FIG.
In order to surely contact the lower floor B, it can be rotated to adjust the protruding size of the contact portion. When loading a load larger than the loading platform 5, the reinforcing bar 54 is slid to the bottom of the loading platform 5 when the extension platform 51 is turned clockwise as shown by the arrow in FIG. 6 and lifted in the same horizontal direction as the loading platform 5. By inserting into the guide frame 55 provided, the luggage can be mounted on the luggage carrier 5 and the extension platform 51.

Since the lifting device of the embodiment has the above-mentioned construction, its handling will be described below. Now, it is assumed that the elevating device is set between the frames 1A and 1B, the loading platform 5 is in the lowest state at the bottom, and the power-on switch 26 of the controller 26 is in the on state.

In this state, when the luggage is loaded on the loading platform 5 and is raised, when the motor 7 is driven by operating the raising button 29a of the operating switch 29, the sprocket 10 causes the chain on the frames 1A and 1B to move. 3A, 3B
Since the sprocket 10 rotates, the sprocket 10 moves on the chains 3A and 3B, so that the loading platform 5 ascends together with the drive means. In this case, since the loading platform 5 stops when it has moved to the upper ends of the frames 1A and 1B, it is possible to lift the luggage and the like to the upper floor C side.

On the other hand, when lowering the lifted platform 5, when the motor 7 is reversely driven by operating the lowering button 29b of the operation switch 29, the sprocket 10 moves downward on the chains 3A and 3B while rotating. As a result, the loading platform 5 moves down together with the drive means. Then, when the loading platform 5 moves to the lower end portions of the frames 1A and 1B, that is, when it moves to the position of the desired state which is the position of the first step of the stairs A, it stops.

The lifting device according to the embodiment is composed of both frames 1A and 1A.
B face each other at intervals and are arranged on both sides of the stair A.
You can climb and descend between B. In this case, each of the frames 1A and 1B has an individual width of about 50 mm in this example, and therefore, if the step width is 400 to 650 mm, the width is 300 to
Since the width of 550 mm is the width that can be passed, it is possible to easily go up and down the stairs A even when the device is installed on the stairs A. Further, the frames 1A and 1B are arranged on both sides of the stair A, and both the frames 1A and 1B are arranged.
Since the structure is such that the cargo bed 5 is supported between B, the frame 1
The widths A and 1B can be formed to have the narrow dimensions as described above, so that the lifting device as a whole can be reduced in weight.

Further, not only the driving means is arranged below the loading platform 5, but when the loading platform 5 is in the desired state, it is almost at the same height as the first step of the stairs A, so that the user can see the stairs A. It can also be used as a part of. Therefore, even if the elevating device is installed on a narrow staircase A such as a ship, it is not necessary for the user to pass while avoiding the loading platform as in the prior art, and it also obstructs the passage of the user. Never be.

Further, it has a protective cover 14 capable of enclosing the sprocket 10 of the driving means, and also has a first safety mechanism, and when an obstacle hits the front cover portion 14a of the protective cover 14 when the loading platform 5 is raised, Further, when an obstacle hits the rear cover portion 14b during the lowering of the loading platform 5, the power of the motor 7 is immediately shut off to stop the lifting and lowering of the loading platform 5, so that an operator or the like mistakenly gets caught in the lifting device when lifting or lowering. Can be prevented.

Furthermore, when the luggage carrier 5 is stopped, even if the luggage carrier tries to move for some reason, the speed sensor of the second safety mechanism detects it and the engagement pin 22
Prevents the cargo bed 5 from moving further, so that even if the stopped cargo bed 5 may move, it can immediately stop, thus avoiding danger. You can

Further, a folding type extension table 51 is attached to the tip of the loading platform 5 via a hinge 52, and by using the extension platform 51, it is possible to mount a large baggage that cannot fit on the loading platform 5, so that the loading platform 5 is It is possible to move up and down stably even with luggage that may become unstable. In the illustrated embodiment, the example is shown in which it is installed on the stairs of a ship, but it goes without saying that it can also be used on the stairs of general buildings such as buildings.

[0035]

As described above, according to claim 1 of the present invention, they are arranged so as to face each other with a desired interval,
Both frames installed on the stairs, a chain fixed on both frames, a loading platform for loading luggage, and a drive means for moving the loading platform up and down along each chain on both frames, the frame is By arranging them on both sides, users of the stairs can go up and down between both frames, so it is possible to pass between both frames even on narrow stairs, and it is easy to go up the stairs even with the device installed. Since the two frames can be formed to have a narrow width, there is an effect that the entire lifting device can be reduced in weight.

According to a second aspect of the present invention, the loading platform is moved up and down along each chain on both frames, and the driving means has a sprocket that meshes with the chain, a driving source that drives the sprocket, and a sprocket of the driving means. Of the drive means when an obstacle hits either one of the front and rear cover parts of the protective cover, which can surround the circumference of the load carrier and has front and rear cover parts at the front and rear parts in the traveling direction of the loading platform. Equipped with a safety mechanism to stop the drive,
When an obstacle hits the front and rear covers that are in front of the protective cover in the direction of travel, the power of the drive source is immediately shut off to stop the ascending and descending of the loading platform. It is possible to prevent accidentally getting caught in the lifting device, etc., and there is an effect that the safety at the time of lifting can be improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a lifting device of the present invention.

FIG. 2 is a schematic side view showing a main part of a lifting device.

3 is a III-II of FIG. 2 showing a driving means of the lifting device.
Explanatory drawing equivalent to I line.

FIG. 4 is an explanatory diagram showing the periphery of a protective cover of the lifting device.

FIG. 5 is an explanatory diagram showing a controller and operation switches.

FIG. 6 is an explanatory view showing a main part of a luggage carrier when an extension platform is used.

[Explanation of symbols]

1A, 1B ... Frame, 3A, 3B ... Chain, 5 ... Luggage, 6 ... Main body, 7 ... Motor, 8 ... Coupling, 9 ... Connection shaft, 10 ... Sprocket, 11 ... Luggage support, 12
a, 12b ... Guide roller, 14 ... Protective cover, 14a
... front cover part, 14b ... rear cover part, 16a, 16b,
17a · 17b, 18a · 18b, 19a · 19b, 2
0a ・ 20b ... first safety mechanism, 22-26 ... second safety mechanism.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area E06C 7/12 E06C 7/12

Claims (2)

[Claims] 1. A pair of frames, which are arranged to face each other at a desired interval and are installed on both sides of the stairs, a chain fixed on both the frames, and a luggage carrier for carrying luggage.
An elevating device comprising: drive means for elevating the platform along each chain on both frames. 2. Both frames, which are arranged to face each other at a desired interval and are installed on both sides of the stairs, chains fixed on both frames, and a luggage carrier for carrying luggage.
Raise and lower the carrier along each chain on both frames,
And a sprocket that meshes with the chain, a drive means having a drive source for driving the sprocket, and a protective cover that surrounds the sprocket of the drive means and that has front and rear cover portions at the front and rear portions in the traveling direction of the luggage carrier. And a safety mechanism for stopping the drive of the drive means when an obstacle hits either the front cover or the rear cover of the protective cover.